A cobpobatiojt



F. R. MERRITT.

ABRASIVE TOOL.

APPLlCATiON FILED OCT. 17, mm.

Patented J uly 1, 1912).

no STATES PATENT OFFICE.

FRANK R. MERRITT, OT HAVEBHILL, MASSACHUSETTS, ASSIGNOR, BY MESNEASSIGN- MEETS, TO UNITED SHOE MACHINERY CORPORATION, OF EATERSQN, NEWJERSEY,

A CORPORATION 01 NEW JERSEY,

ABBASIVE TOOL.

Specification of Letters Patent.

Patented July 1, 1919,

a us ments ar 17, 1917. Serial a. route;

To all whom it'may concern a Be it known that I, FRANK R. Mnnnrrr,

'a citizen-of the United States, residing at Haverhill, in thecollnty ofEssexand' State of- Massachusetts', have invented certain Improvementsin Abrasive Tools, ofwhich the ollowing description, in connection withthe v accompanying drawings; is a specification,

like reference characters on the drawings indicating like parts in theseveral figures.

This invention relates to abradln devlces and is herein illustrated asembodied ina 7 device for landing the bottoms of boots and shoes.

shank of the so e of a shoe by means ofa circular pad of abrasivematerial mounted" on a holder-at the lower end of .a rotary shaft, thepad beingdetachably clamped to the holder so that it may readily beremoved and replaced. A- pad of, this had its holder and clamping mean'sw ch have gone into wide commercial l1$ ,,B-re shown in j v sandpaperobone form otthe patented construction the pad is heldgin lace-"by arightangled til-shaped clampmg prongs of which extend through holes inthe pad and its holder, said memberbeing forced up toward the lowerendof the rotary shaft by a screw which passes through the center ofitshorizontal base and islthreaded into the lower end of the shaft.Inthis construe tion. no upward pull is exerted upon the prongsthemselves, their; function": being wtd and the prongs of t mere y toserve as additional means for preventin and its holder. I

The general object of the present invention exam is as that of thepatent; ,To this end one eature of .the invention comprises *aconstruction in which the screw "r equivalent elementof the about isdispensed with the holder to the shaft. With this construc tion not onlyis the advantage of dispensing parts of the tools The upright shaft 5 isprovided with a; pulley 7 which may be driven from any fsuitable sourceof power by a belt 9. The

whichdecrease trom'bottom to top member, the arms; or"

pad, the disks being held together by an g relative rptation between thepad clamping member} are engagedibly an adjustable member manipulaher.13 to clam the with the screw obtained but the pad is more firmly held.I a This and other features out the invention including certain detailsof construction and combinations of arts will be described as embodiedin an i lustrative device and will be ointed out in the appended claims.teferring now to the accompanying draw- 1ng:-- Figure 1 is a perspectiveof a bufling tool in which the present invention is embodied; Fig. 2 isa vertical section of the tool, the shaft and the clamping member beingshown a v a in toll, and It is customa to bull the rear part of the-Fig. {3' ice perspective of the separated lower end of the shaft has anenlarged portion 105 and-fitting over this enlarged portion and loose onthe main portion of the 'shaft is a an adjusting nut 11 threaded toreceive the prongs of the clamping member 13 and'counterbored to form ashoulder which enga es the-upper surface of the en larged ortion 105 ofthe shaft. The abrasive pa 15 is made of a plurality of superposed disksof sandpaper the diametes Inf 0 t e as to center the holder with respectto the shaftlj A set of holes 23 extends through the pad and acorresponding set 25 extends through the'holder, said holes beinglocated so as to register and to permit the mugs of the clamping member13 to extend throu h them and into grooves 305 formed in t e shaft 5;The prongs are threaded as shown to correspond to the threads formed onthe interior of the adjusting nut 11..

e 7 To assemble the device the holder and pad are placed in position onthe lower end of the shaft 5, the prongs of the clamping member-arepassed through the holes 23, 25 and ,intothe grooves 305, and the nut 11is I "screwed down thereby drawing u the memad to tie ii the holder to te' shalt. when it becomes worn, the nut 11 is molder and. To renew thepad screwed until the prongs of the clamping member are released, afterwhich a fresh ad fan may be put in place.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is 1. The combinationvwithan abrasive ad, of a rotary member to which the pad is to be fastened, aclamping member having prongs extending through holes in the pad, andmeans for engaging the prongs and drawing the clamping member againstthe P 2. The combination with an abrasive pad, of a shaft to the end ofwhich the pad is to be fastened, a clamping member having prongsextending through holes in the pad and engaging grooves in'the shaft,and adjustable means for engaging the prongs and dralwing the clampingmember against the p 3. The combination with an abrasive pad, of a shaftto the end of which the pad is to be fastened, a clamping member having.prongs extending through holes in the pad and engaging grooves in theshaft and adjustable means carried by the shaft for engaging the prongsand drawing the clamping member against the pad.

4. The combination of an abrasive pad, of a holder therefor, a rotaryshaft to the end of which the holder is to be fastened, means forcentering the holder on the end of the shaft, a clamping member havingprongs extending through the pad and the holder,

and meansengagin the prongs for drawing the clamping mem e'r against thepad to clamp the pad to'the holder and the holder to the shaft.

5. The combination with a holder having a set of holes, of an abrasivepad having a corresponding set of holes, a rotary shaft to which theholder and pad are to be fasbe fastened, a clamping member havingthreaded prongs extending throu h holes in the pad and engaging groovesin t 1e shaft,

and a nut carried by the shaft and threaded to receive the prongs.

7. The combination with an abrasive pad ofurshaft having an enlargementat its lower end, a not carried by the shaft and having an interiorshoulder to engage the enlargement,a pad holder, and a clamping memberhaving prongs extending through the pad and holder, said prongs beingthreaded for engagement with said nut.

In testimony whereof I have signed my name to this specification.

- FRANK R. MERRITT.

